Telephone installation.



A. PIOTET.

TELEPHONE INSTALLATION.

APPLICATION FILED SEPT.9, 1911. 1' m w fifi n Patented Nov. 21, 1911,

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NT nnion AUGFUSTE PICTET, 0F GENEVA, SWITZERLAND.

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Specification of Letters Patent.

Application filed September 9, 1911.

Patented NOV... $1, 191th.

Serial No. 648,45?

To all whom it may concern:

Be it known that I, AUGUsTn-PIGTET, a citizen of the Swiss Republic, and resident of Geneva, Switzerland, have invented new and useful Improvements in Telephone Installations, of which the following is a full, clear, and exact specification.

The present invention relates to an improvement in telephone installations which consists in bringing any desired advertise ment to the ears of a caller. through his receiver-without interfering with the opera tion of the system-during the time of waiting taken to complete speaking connections with the called station; this time of waiting includes: 1, the time from the taking down of the receiver at the calling station up to the response of the exchange or connection exchange station; 2, the time taken for the exchange to connect itself to another exchange in case the called station is not on the same exchange as the calling station as is often the case in large towns; 3, the time until the called station responds.

The improved arrangement constitutes a real means of advertising from which the person calling cannot escape.

In the accompanying drawings the improvement is illustrated as applied to an installation on'the well known common battery system (of the Western Electric Company) the conductors and parts necessary to the invention are shown in thicker lines.

Figure 1 is a complete diagram of connections of such an improved installation;

' Fig. 2 is a diagram of the connections constituting the improvement alone.

Obviously the present invention can be applied to telephone installations of any system whatever.

Before the improvement is further detailed it may be well to describe a telephone installation of the known common battery system for one subscribers station (Fig. 1).

Kc are the usual three part jacks at the exchange through which subscribers are connected by means of the well known three, part plugs; Kc is the inquiry jack belonging. to them, Alt a calling relay for each line, which controls the calling lamp AZ; TB is a disconnezting relay with two armatures which disconnects the calling relay during the time of a conversation, and (JR is an auxiliary relay common to-the whole operators bench operating two pilot lamps Pl, Pl. ZB is the central or common battery it the central battery ZB, while the third core 0 of said cable contains two clearing lamps Sl 3Z which are controlled by two clearing relays SR SR and finally H is the socalled listening key which as may best be seen from Fig. 2 may be put into a calling position (x), a through speaking position (y) and an inquiry position (a). All'these are known devices and shortly they operate as follows.

If the receiver is taken from the hook at the subscribers station to which the lines a,

-Z) lead so that the circuit of battery ZB is closed over a, b, the current from the battery excites the relay AR and this through its armature closes the circuit for the callin lamp AZ and for the auxiliary relay Cit; the latter is actuated and closes the circuit for the two pilot lamps Pl, PP. The op orator-now puts the inquiry plug AS of her speaking set into the inquiry jack Ka and so connects the wires a, b to the corresponding cores a b of the inquiry cable. Since the battery ZB is connected between these cores, current flows from it over the clear- ,ing relay SR to the subscribers lines. At

the same time current passes from the battery, the positive poleoi which is earthed, over the core 0 of the operators cable and through the lamp SZ to the casing of Ka, from whence it passes through the disconnecting relay TR to earth. The disconnecting relay is actuated and disconnects the lines a, b which end upon its armatures from the battery ZB and from the calling relay AR. The lamp SP is prevented from lighting because it is shunted by the resistance 20 and the attracted armature of the clear ing relay SR By movement of the listening key H (in Fig. l upward, in Fig. 2 to t is right) the operators inquiry device, not

shown, which is joined to the conductors m is connected in. if now the desired line is free, the connecting plug VS is put into the multiple jack Kc. Current then flows from the negative pole over wire 0 of the plug cable through the lamp S1 plug VS, the jack casings and the disconnecting relay ct the second subscribers line to earth and so disconnects its calling relay. The lamp S1 lights up until the Subscriber who is called Eiy'movement of the switch H (in Fig. 1 downward and in Fig. 2 to the left) takes down his receiver and so opens the path for the battery current over his station. Relay.

SR then responds and its armature shunts the lamp 8Z When the receivers are again I hung up after the conclusion of the conversation, relays SR and SR cease to be excited. Their armatures fall back and the clearing lamps Sl, SZ light up.

Turning 'now to the actual improvement the lines a, b of each subscribers station are,

connected through two wires g, h to bus bars z', j which' in their turn are connected directly or through an'induction coil IR with one or more microphones In front of- -these microphonesis a phonograph or other speaking machinewhich perpetually repeats some advertisement, for example, Drink Xs- Cocoa, or repeats --.this in alternation with other advertisements. circuit g, h contains the armature e of an electromagnet E having two windings e 6 of which the winding e is connected in series with the. calling lamp'AZ of the first subscribers station, while the other .wind ing 6? is joined on the one hand to the p os1-' tive pole of the battery ZB and on the otherj hand to an additional jack casing is mountedi upon the inquiry jack Kc. The inquiry plug A$ has an additional connecting vpiece k corresponding to this additional ack casing is;

and this'is connected with a fourth core 05 of the operators cable; when the. plug AS. is put. in, this core (1 'connects the winding,

' 6 over a second armature 1- of the clearing trolled by the listening key H to the negarelay SR of the second or called subscribers station and over an interrupter H contive pole" of the battery ZB. The interrupter H is so arranged and so controlled. by said key that in the through speaking position of the key the circuit of the core 03 is closed (see Fig. 2);: As soon as the receiver is taken down at the first or calllng station the corresponding calling lamp AZ lights up as above described-and at the same time the electromagnet E, the Winding e of which receives'current, attracts its armature'c so that the auxiliary circuit g, It of the calling station is closed and the calling subscriber is put into connection with the induction coil IR so that he hears the adve'rtisements spoken into the microphone or microphones MR. When the operator puts the inquiry plug AS into the appropriate inquiry ja'ck Ka and moves the listening key H'mto the inquiry position so as to put herself into connection with'the calling subscriber, thus extinguishing the'calling lamp Al, the windin e of the electromagnet'E is also depriv .The auxiliary v 'sary connecting wires. modlficatlon necessary in the multiple acks.

oi current at'the sametime.

and armature e" is drawn back so .that the calling subscriber is disconnected from the advertisement circuit and is only in connec tion with the operator. As soon as the op erator puts the listening key H into the through speaking or middle position after winding 6 of the electromagnet E and to so effect the disconnection of the advertisinga-difi'erent exchange from the calling subscriber, the latter is put in connection with the advertising circuit while the operator of the one exchange puts herself into connection with the other through the ordinary service line and brings the listening key H .circuit. If the called subscriber belongs to into the through speaking position; and he .remainsthus connected until the called subscriber answers.

. As may be seen the present invention requires no substantial alteration of existing installations. All that is necessary is the addition of a double Wound electromagnet for each subscriber, the corresponding alteration of the inquiry jack and inquiry plug,

and the use of an interrupter controlled by the listening key together with the neces- In no case is any What I claim is:

1 In telephone installations, the combination with a subscribers stat-ion and a connection exchange station of an auxiliary circuit, an electric and'phoneti'c receiving and transmitting device on this-auxiliary circuit for receiving and transmitting audible advertisements, an electric control device for controlling this auxiliary circuit,

and means on the connection exchange station for setting this control device in operation when the subscribers station calls up during the time elapsing before the completion of speaking connections.

2. In telephone installations, the combination with a subsc'ribers station and a connection exchange station of an auxiliary circuit branched from the lines of the subscribers station, an electric and phonetic receiving and transmitting device on this auxiliarr circuit for receiving and transmitting audible advertisements, an electromagnet on the connection exchange station for controllingthis auxiliary circuit, and means on the con-, nectlon exchange statlon for setting this electromagnet in operation when the sub scribers station calls up duringthe time elapsing before the completion of speaking connections.

3. In telephone"installations, the con1bina tion of a subscribersstation, a connection exchange station having a common battery, a calling relay, a calling lamp controlled by said calling relay, an inquiryjack with an auxiliary casing part, an inquiry plug with an auxiliary connecting part, a multiple connecting plug system, a clearing relay and a listening'key, an auxiliary circuit branched from the lines of the subscribers station, an electric and phonetic receiving and transmitting device on this auxiliary circuit for receiving and transmitting audible advertisements, an electromagn'et on the connection exchange station for controlling said auxiliary circuit, having two windings, one of Which is connected in series With said calling lamp, While the other is connected to said auxiliary casing part of the inquiry jack, a conductor connecting the battery with said auxiliary connecting part 01 the inquiry plug and forming part of a circuit controlled by said clearing relay, and an interrupter in this latter circuit controlled by said listening key, substantially and for the purpose described.

In Witness whereof I have hereunto signed my name this 29 day of August, 19.11, in the presence of two subscribing witnesses.

AUGUSTE PICTET.

Witnesses GEORGE GIFroRD, AMAND BRAUN.

[Miles of thla patent may be obtained for five cents each, by addressing "the Commissioner of Patents, Washington, D. G. l 

